Hmmm... weird. Mitsuko is too naive and lets the other one do whatever he wants, kappa is overbearing, bossy and emotionally blackmails Mitsuko, I didn`t really see any romantic feelings between those two, kappa was just using the situation to his advantage. And why didn`t M. at least get a little angry after kappa basically marked him as his possession?! Plus the mpreg was somewhat unnecessary (such a weird condition to become adult).
Second story with father and uncle isn`t very good either. Yokai father renders uncle unconscious and kidnaps him (and M. is just calmly waving goodbye, srsly?!!), then he proceeds to ignore his rejections, basically rapes him and forcefully marks him... Yeah, lack of consent in this manga is seriously appalling, it could have been way better if the characters had better characterization. It`s a shame, really, because the art is pretty and the yokai father/adult son are downright gorgeous (thus two stars instead of one)
Jappa No Amane